Split each prompt section into parallel .en.md/.zh.md bundles (sops, api-docs,
ceo-modes, department-guidelines) and mirrored messages/{operating,system}-{en,zh}.ts
modules for the inline identity/culture/rules text that had stayed as hard-coded
English template literals. Every loader now resolves a locale via a single
shared helper so CEO and IC prompts come out fully Chinese when locale=zh and
fully English otherwise, removing the need for the trailing "请记住:全程使用中文"
language reminder.